40121187 has 4 divisors (see below), whose sum is σ = 53494920. Its totient is φ = 26747456.

The previous prime is 40121183. The next prime is 40121189. The reversal of 40121187 is 78112104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40121187 - 2² = 40121183 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40121183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6686862 + ... + 6686867.

It is an arithmetic number, because the mean of its divisors is an integer number (13373730).

Almost surely, 2^40121187 is an apocalyptic number.

40121187 is a deficient number, since it is larger than the sum of its proper divisors (13373733).

40121187 is a wasteful number, since it uses less digits than its factorization.

40121187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13373732.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 40121187 is about 6334.1287482968. The cubic root of 40121187 is about 342.3402192185.

The spelling of 40121187 in words is "forty million, one hundred twenty-one thousand, one hundred eighty-seven".